Support "Assemble them all" trajectory generation from CAD

cg/freecad/Frames/usecases/assembly_parse_usecase.py

@@ -1,20 +1,40 @@
 import FreeCAD as App
-from helper.is_solid import is_object_solid
- 
+def is_object_solid(obj):
+    """If obj is solid return True"""
+    if not isinstance(obj, App.DocumentObject):
+        return False
+    if hasattr(obj, 'Group'):
+        return False
+    
+    if not hasattr(obj, 'Shape'):
+        return False
+    # if not hasattr(obj.Shape, 'Mass'):
+    #     return False
+    if not hasattr(obj.Shape, 'Solids'):
+        return False
+
+    if len(obj.Shape.Solids) == 0:
+        return False
+
+    return True
+
 
 class AssemblyParseUseCase:
     _parts = []
+
     _asm = []
 
+    def getAsm(self):
+        return self._asm
+
     def __init__(self) -> None:
-        self.initParse()
+        if (self._asm.__len__() == 0):
+            self.initParse()
         pass
 
-    
-
     def initParse(self):
-        for el in  App.ActiveDocument.Objects:
-            if(is_object_solid(el)):
+        for el in App.ActiveDocument.Objects:
+            if (is_object_solid(el)):
                 self._asm.append(el.Label)
 
     def toJson(self):
@@ -28,15 +48,11 @@ class AssemblyParseUseCase:
                     if groupLink.get(el.Label) == None:
                         groupLink[el.Label] = []
                     for i in el.Group:
-
                         if str(i).find('Pad') != -1:
                             groupLink[el.Label].append(i)
         if groupLink.__len__() == 0:
-            return None                    
+            return None
         return groupLink
 
     def getLinkedProperty(self):
         return self._asm
-
-  
-